Danise, I use bookmarks and, what's more, I collect them too...I always pick them up from whatever bookstore I go into...I have them from all over the country and parts beyond. I've got scads of paper ones, leather ones, metal ones, laminated ones, wooden ones...I never counted how many; some are years old...
Probably the oldest one is a Tarzan bookmark promoting the novels from the late twenties/early thirties...when Grosset & Dunlap reprint editions cost 75 cents. Of interest to BK, I have one from Pickwick Book Shop when it was still called Pickwick and the phone number was HO 9-8191 and they also had a branch in Canoga Park as well as Hollywood. I found both it and the Tarz one in old books I bought.
I figure with a bookmark I don't have to remember the page and it saves wear and tear on the book, since I don't have to go flipping pages to find my place...even if I have remembered the page number. Not important to everyone, perhaps, but certainly to a book collector.